voonhous commented on code in PR #17535:
URL: https://github.com/apache/hudi/pull/17535#discussion_r2615047682
##########
hudi-common/src/main/java/org/apache/hudi/common/schema/HoodieSchemaCompatibility.java:
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@@ -121,6 +123,26 @@ public static boolean isSchemaCompatible(HoodieSchema
readerSchema, HoodieSchema
return isSchemaCompatible(readerSchema, writerSchema, true);
}
+ /**
+ * Checks if two schemas are compatible with projection support.
+ * This allows the reader schema to have fewer fields than the writer schema.
+ *
+ * @param readerSchema the schema used to read the data
+ * @param writerSchema the schema used to write the data
+ * @param checkNaming controls whether schemas fully-qualified names
should be checked
+ * @param allowProjection whether to allow fewer fields in reader schema
+ * @return true if reader schema can read data written with writer schema
+ * @throws IllegalArgumentException if schemas are null
+ */
+ public static boolean isSchemaCompatible(HoodieSchema readerSchema,
HoodieSchema writerSchema,
Review Comment:
Nope, I'll add some.
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